UGI getCurrentUser is not synchronized --------------------------------------
Key: HADOOP-7854 URL: https://issues.apache.org/jira/browse/HADOOP-7854 Project: Hadoop Common Issue Type: Bug Components: security Affects Versions: 0.20.205.1 Reporter: Daryn Sharp Assignee: Daryn Sharp Priority: Critical Sporadic {{ConcurrentModificationExceptions}} are originating from {{UGI.getCurrentUser}} when it needs to create a new instance. The problem was specifically observed in a JT under heavy load when a post-job cleanup is accessing the UGI while a new job is being processed. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira